Property, Plant and Equipment (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014
Property, Plant and Equipment
Property, plant and equipment, gross	$ 119,304,000		$ 119,304,000		$ 97,202,000
Less accumulated depreciation	(39,039,000)		(39,039,000)		(35,498,000)
Property, plant and equipment, net	80,265,000		80,265,000		61,704,000
Impairment charges	0	0	0	0
Property, plant and equipment, net, held in foreign countries	1,200,000		1,200,000		1,100,000
Land
Property, Plant and Equipment
Property, plant and equipment, gross	4,641,000		4,641,000		4,641,000
Building and improvements
Property, Plant and Equipment
Property, plant and equipment, gross	46,330,000		46,330,000		42,013,000
Building and improvements | Minimum
Property, Plant and Equipment
Useful Lives	10 years		10 years
Building and improvements | Maximum
Property, Plant and Equipment
Useful Lives	39 years		39 years
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	44,311,000		44,311,000		37,678,000
Machinery and equipment | Minimum
Property, Plant and Equipment
Useful Lives	5 years		5 years
Machinery and equipment | Maximum
Property, Plant and Equipment
Useful Lives	10 years		10 years
Furniture and fixtures
Property, Plant and Equipment
Property, plant and equipment, gross	1,719,000		1,719,000		1,416,000
Furniture and fixtures | Minimum
Property, Plant and Equipment
Useful Lives	5 years		5 years
Furniture and fixtures | Maximum
Property, Plant and Equipment
Useful Lives	7 years		7 years
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, gross	$ 22,303,000		$ 22,303,000		$ 11,454,000